To: Interested Parties

From: Water Resources Branch

RE: April 2005 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for April 2005. Water quality sampling was performed April 11th through April 14th. Recent weather (previous seven days) in the Sabine River Basin was warm, with daytime highs from the upper 60s to the mid 80s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the upper 60s to the low 80s. Lows ranged from the low 40s to the mid 60s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the upper 40s to the upper 60s. The waters of Lake Tawakoni and Lake Fork were mixed, exhibiting no thermal stratification. During the 28 days prior to the sample run, the Upper Basin received 4.56 and 2.91 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received 2.62 and 0.99 inches of rainfall the week preceding the sample run. Toledo Bend and Orange received 5.11 and 1.99 inches, respectively, during the 28 days prior to the sample run.

Upper Sabine Basin Above Toledo Bend Including Lake Fork and Lake Tawakoni

Most water quality parameter measurements at Upper Basin sites were consistent with water of high quality. The level of Lake Fork was recorded at 402.97 feet msl with 8 cfs releases and the level of Lake Tawakoni was recorded at 437.34 feet msl with 6 cfs releases at the time of sampling. Stations SR22 and SR19 exceeded the recommended screening criteria for chlorophyll a and stations SR22, SR11 and SR10 exceeded the Stream Standards numeric criteria for E. coli.


Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The April monthly sampling results were indicative of water of high quality at most sites. The area received two inches of rain during the week of sampling. The level of Toledo Bend Reservoir was recorded at 170.95 feet msl with 7,054 cfs discharge at the time of sampling. Most reservoir stations were well mixed or only slightly stratified with similar readings throughout the water column. Stations TB8, TB7A, BA4, SR5, SR3, and BCC1 displayed high bacteriological results due to the very heavy rains during the sampling week.

Tidal Section of the Sabine Basin below Morgan Bluff

Most sites sampled in the tidal portion of the Sabine Basin had values that are consistent with water of high quality. The tidal stations received 0.75 inch of rainfall during the seven days prior to the sample run. Most of the sites in this section of the Basin were well mixed with only slight stratification, and no anoxic conditions were found at any tidal station. Surface salinities were found at all but two stations. The greatest salinity value of 12 ppt was found at station SRT1 at a depth of 10.1 meters. All parameters measured in this section of the basin were within Stream Standards criteria.

 

This Report and additional data for these monitoring stations are available on our World Wide Web site (www.sra.dst.tx.us). If you have any questions or comments concerning this report, please contact:

 

      Upper Sabine Basin
Terry Wilson, Upper Basin Field Office Coordinator
903-878-2420 (twilson@sra.dst.tx.us)

      Lower and Tidal Sabine Basin
Jerry Wiegreffe, Lower Basin Field Office Coordinator
409-746-3284 (jwiegreffe@sra.dst.tx.us)

      If above are unavailable
John Payne, Special Projects Administrator
409-746-2192 (jpayne@sra.dst.tx.us)
or
Miles Hall, Resource Management/ Project Development Division Manager
409-746-2192 (mhall@sra.dst.tx.us)

 

Printed Monday, June 13, 2005 at 08:03